$30 Retail OLAPLEX No.0 Intensive Bond Building Hair Treatment OLAPLEX No.0 Intensive Bond Building Hair Treatment is a professional-inspired treatment that primes your hair for deeper repair, rebuilds hair bonds, strengthens, and protects hair integrity. Use as the first step in a two-part system with No.3 Hair Perfector (sold separately). Net Wt: 5.2 Fl oz